Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 21)

Contents
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xix
Creating expressions .................................................................................... 14-3
Expression buttons.................................................................................................... 14-4
Cutting, copying, and pasting expressions ................................... 14-4
Formatting expressions .............................................................................. 14-6
Using the = (Equal) command ................................................................. 14-6
Using tag names and tag placeholders ........................................... 14-8
Using tag placeholders instead of tag names ......................................................... 14-9
Constants .............................................................................................................. 14-9
Arithmetic operators ................................................................................... 14-10
String operands ........................................................................................................ 14-10
Relational operators .................................................................................... 14-11
How string operands are evaluated....................................................................... 14-11
Logical operators ........................................................................................... 14-12
Bitwise operators .......................................................................................... 14-12
Built–in functions ........................................................................................... 14-14
Tag functions............................................................................................................ 14-15
Time functions ......................................................................................................... 14-16
File functions............................................................................................................ 14-20
Math functions ......................................................................................................... 14-21
Security function ...................................................................................................... 14-22
Evaluation order of operators ............................................................... 14-22
If–then–else ........................................................................................................ 14-24
Nested if–then–else structure ................................................................................ 14-25
Chapter 15
Setting up navigation
Developing a hierarchy of displays ..................................................... 15-1
Methods for moving among displays ................................................. 15-2
Commands for moving among displays................................................................. 15-3
Reducing display call–up time.................................................................................. 15-4
Where to use RSView32 commands....................................................................... 15-4
Example of navigation methods ........................................................... 15-5